Solar System Motorhome: What You Need to Know

Solar System Motorhome: What You Need to Know

Embarking on adventures in your motorhome brings a sense of freedom and excitement unlike any other. However, sustaining this freedom, especially in terms of power supply, can be a big challenge. A solar system motorhome setup, in this case, emerges as an efficient and eco-friendly solution to power your journey on the open road.

This guide delves into the essentials of solar system for motorhomes, from the basics of a PV motorhome setup and workings of solar panels to the intricacies of battery types and essential considerations for purchasing and installing. Embrace the sun's power and transform your travel experiences with us!

The Basics of Motorhome Solar Systems

At its core, a motorhome solar system is designed to convert sunlight into electricity, providing a renewable source of energy for your traveling home. A typical motorhome solar system comprises several crucial elements:

  • Solar Panels:These are the primary components of the system, responsible for converting sunlight into electrical energy. For motorhomes, you can either choose to mount these panels permanently on the roof or opt for portable solar panels designed for easy setup and takedown.
  • Battery Bank:The battery bank stores the electricity generated by your solar panels for use when the sun isn't shining. The capacity and type of your battery bank will dictate how much power you have on hand.
  • Charge Controller:This device regulates the flow of electricity from the solar panels to the battery bank, ensuring batteries are charged optimally without being overcharged.
  • Inverter:An inverter converts the DC electricity stored in your batteries into AC electricity, which can power the appliances and devices within your motorhome.

How Do Solar Panels for Motorhomes Work?

Solar panels allow motorhomes to use sunlight for electrical power, functioning through a few key steps:

  1. Conversion to Electricity:Solar panels are made up of photovoltaic cells, which convert sunlight into direct current (DC) electricity. This happens when the sunlight's photons excite electrons in the cells, creating an electrical current.
  1. Energy Storage:The DC electricity produced during the day is stored in a battery bank, allowing for energy use at night or on cloudy days, ensuring a constant power supply.
  1. DC to ACInversion: Since motorhomes primarily use alternating current (AC), an inverter is used to convert this stored DC electricity into AC, making the power suitable for running appliances and devices.

Battery Types for Motorhome Solar Panels

Solar systems typically use rechargeable batteries to store electrical energy for use when solar power isn't directly available. Here are the three most common types of batteries used in motorhome solar systems, each with its unique advantages and considerations.

Gel Battery

Gel batteries are a type of sealed lead-acid battery, where the electrolyte is suspended in a silica gel. This design makes them leak-proof and resistant to vibration, an advantage for moving vehicles.

  • Advantages:Low maintenance and minimal risk of leaks. They are also known for their good performance in extreme temperatures and a slow self-discharge rate.
  • Considerations:Gel batteries generally have a lower charge rate and are more sensitive to overcharging than other types. They also tend to be more expensive.

Lithium-Ion Battery

Lithium-ion batteries, like those used in the Anker SOLIX balcony power plant with storage, are popular for their high energy density and efficiency. They can store more electricity in a smaller, lighter package compared to lead-acid batteries.

  • Advantages:High energy density, lightweight, and long lifespan. They also offer high charge and discharge efficiency and can handle deep discharge cycles well.
  • Considerations:The initial cost of lithium-ion batteries is higher than lead-acid batteries, but their longer lifespan and better performance can offset this over time.

Absorbed Glass Mat Battery

An absorbed glass mat (AGM) batteries are another type of sealed lead-acid battery, using a fiberglass mat to absorb the electrolyte. They are known for their durability and performance.

  • Advantages:Resistant to vibration and shock, making them ideal for motorhome use. AGM batteries charge faster than gel and traditional lead-acid batteries and have a lower self-discharge rate.
  • Considerations:While they offer several benefits over gel batteries, including a better charge rate, they can be more expensive. However, they are typically less expensive than lithium-ion batteries.

Considerations When Purchasing Motorhome Solar Systems

Several crucial factors must be taken into account when purchasing a solar system for your motorhome. Doing so ensures that your balcony power plant investment is tailored to your specific needs and circumstances. Here are key factors to consider:

  • Power Needs:Start by calculating how much power you use on a typical day in your motorhome. Consider all appliances and devices you intend to power—like refrigerators, lights, and chargers—to determine the total wattage needed. This will help you choose a system that can meet your energy demands.
  • Solar Panel Type and Efficiency:There are primarily three types of solar panels available for motorhome: monocrystalline, polycrystalline, and thin-film. Monocrystalline panels are highly efficient but tend to be more expensive, while polycrystalline panels offer a balance of efficiency and cost.

Higher efficiency panels produce more power per square foot, which is crucial if you have limited space on your motorhome's roof. For example, the monocrystalline panels used in the Anker SOLIX balcony power plant boasts an impressive efficiency rate of 25%, maximizing energy production.

  • Battery Capacity and Type:Ensure the battery bank you choose has enough capacity to store the energy your solar panels produce. This is critical for meeting your power needs during the night or cloudy days. As we've discussed, consider the pros and cons of different battery types (Gel, Lithium-Ion, AGM) in terms of lifespan, maintenance, and cost.
  • Quality and Durability: Your solar system will be exposed to various weather conditions and vibrations while on the road. Look for systems designed for durability and resistance to harsh conditions. A good warranty can serve as an indicator of the system's quality. Opt for products with longer warranties for peace of mind.

Things to Note When Installing Motorhome Solar Systems

Before installing a solar system for your motorhome, it's critical to understand a few key factors. Doing so ensures that you get optimal performance and longevity from your balcony powerplant with storage. Here are a few things you should consider carefully:

  • Space Assessment:Evaluate the available roof space on your motorhome to determine how many panels can be installed. Consider the size and layout to maximize sun exposure.
  • Orientation and Tilt:Panels should be positioned to maximize sunlight exposure. While flat mounting is common for simplicity and aerodynamics, adjustable tilt mounts can enhance efficiency by aligning panels with the sun's angle, especially during winter months.
  • Secure Routing:Ensure that wiring from the solar panels to the battery bank is properly routed and secured to avoid damage while on the move. Use protective conduits and check that all connections are waterproof, especially on the roof.
  • System Compatibility:Verify that all components (panels, controller, batteries, and inverter) are compatible and correctly matched in terms of voltage and capacity to prevent system inefficiencies or damage.
  • Proper Placement:Install the charge controller and inverter in a location that is protected from the elements and easily accessible for monitoring and adjustments.
  • Seek Expertise: While many enthusiasts successfully undertake DIY installations, consulting with a professional can provide valuable insights into the best practices and latest technologies. They can also help identify potential issues before they become problems.


As we wrap up our comprehensive guide to solar system motorhome setups, it's clear that integrating solar power into your mobile abode is not just an investment in green energy but an investment in unparalleled freedom and autonomy on the road. From the basics of how solar panels work to the intricate details of choosing the right panel and battery and installation tips, we've covered all the essentials about retrofitting a solar system in a motorhome. With the right setup, you can ensure your travels are powered by the clean, endless energy of the sun, making your adventures not only more sustainable but also more enjoyable.


How many solar panels are needed to run a motorhome?

To run a motorhome, the number of solar panels needed varies based on the vehicle's daily energy consumption, the power output (W) of the panels, and the average sunlight exposure in the area where the motorhome will be used. Generally, a typical motorhome might use between 6 and 10 kWh of electricity per day. Assuming an average of 5 hours of peak sunlight, you would need approximately 3 to 5 panels with 400W panels. It's advisable to assess your specific energy needs for a tailored solution.

How much does a motorhome solar system cost?

The cost of a motorhome solar system can vary widely depending on the size of the system, the type and quality of the solar panels and other components (like inverters and batteries). On average, you can expect to spend anywhere from €500 to €2,000 for a basic setup. Smaller systems suitable for powering essential electronics and appliances could be on the lower end, while more comprehensive systems designed to support extensive use of electrical appliances could be significantly more expensive.

How long does 1 kwh last in a motorhome?

It depends on what you're powering. To estimate, first, determine the total wattage of all devices and appliances running simultaneously. Then, divide 1,000 watts (1 kWh) by this total wattage to get the number of hours that 1 kWh will last. For example, if your total usage is 500 watts (e.g., lights, a mini fridge, and a TV), 1 kWh would last approximately 2 hours (1,000 watts / 500 watts = 2 hours).